dzImage Library

[LineCutter]

Thanks - I thought not. There do seem to be some around, but a quite an impressive price.

[agraham]

Originally Posted by LineCutter

simple picture processing (brightness, contrast, Gamma being the obvious examples)

First stab at an image processing library. Does contrast, brightness, B&W and colour invert. Have a play. Can easily add gamma correction in the future as it already linearises colour values for internal processing assuming the standard sRGB gamma of 2.2 and reapplies the same gamma on output. Applying a different gamma would be trivial.

[LineCutter]

Give that man another award right now!

That was really quick, really helpful & really useful!

[agraham]

Hugely updated version 1.2 of image processing library posted in its' own thread.

[alfcen]

Haisai Dimitris,
Long time no chat. Hope everything's going well for you.
Sneaky question, can your image library be modified to add
transitions, such as fade-in/out for slide shows?
Don't tell me you can do it.
Cheers
Robert

[brathbone]

Hi dzt,

Any chance you'd be willing to add a JPEGtoByteArray (or similar) function? I am using dzImage to take screenshots and I need to send them over the network. So, essentially I am looking for a way to get JPEG data for a screenshot without writing to a file.

Thanks much for your work on this library.



All the best,

[klaus]

Hi brathbone,
Have a look at this:

Embed and retrieve images in a data file

I think this is what you are looking for.

Best regards
Klaus
Switzerland

[brathbone]

Hi Klaus,

Thanks for the response. I took a look at that thread but did not find a solution to my problem. I may have overlooked it.

Perhaps my questions is better explained with code. My goal is to take a screenshot, convert the BMP screenshot data to JPEG, then send the JPEG data across a TCP socket connection. I would like to avoid saving the image to a file in order to do the JPEG conversion. This is how my code looks for sending BMP data:

'BMPU is part of my custom protocol
header() = bit.StringToBytes("BMPU ",0,5)

'CRLF used to terminate commands and transfers
terminator() = bit.StringToBytes("</terminator>" & Chr(13) & Chr(10),0,15)

'Capture Screen Image
dzImageclass.ScreenCapture

'Send protocol command
stream.Writebytes (header())

'Send Image Data
stream.WriteBytes (imageclass.ImageToByteAray(imageclass.Image))

'Send Terminator
stream.WriteBytes(terminator())


What I would like to be able to do is something like this:

'Send Image Data
stream.WriteBytes (dzImageclass.ImageToJPEGByteAray(dzImageclass.Ima ge))


I appreciate any help you can offer.

Thanks again for your time,

[agraham]

Try this Brian. The only way (native to .NET) to get a JPG is to save a bitmap to a file or stream, you can't get access to the encoded bytes directly. This tiny library tries to save a bitmap to a stream.

EDIT :- Note that your device may not support saving a JPG. Not all do.

[klaus]

In trying to use sahoops Screen Capture App, I have a problem on my device.
I found that there is a problem with the SaveImageXXX functions on my Qtek 9090.
I get the message below.
I have added a small test code.
On the device, I can even not load this code in B4PPC.

Does anyone know what is wrong, do I missing some part of .NET 2 ?

Thank you in advance.

Klaus
Switzerland